[IDEA] Headless mode - how to run XBMC in a Raspberry Pi but output display in a laptop

[mixpc]

Software
XBian version: alpha5
XBMC version: 12
Overclock settings: none

Hardware
Power supply rating: it's just ok.
RPi model (model A/B 256mb/512mb): B
SD card size and make/type: 16GB
Network (wireless or LAN): Raspberry Pi connected to laptop by means of an RJ45 network cable
Connected devices (TV, USB, network storage, etc.): NONE, no keyboard. Nothing. Just power and RJ45.

Problem description: I'm trying to get XBian's XBMC displayed in my laptop screen. I've followed the guide here and been successfull up to ssh'ing into Xbian in text mode. Now, there's not way I can run XBMC either by issuing commands such as startx or xbmc start. Of course, I have followed instructions in the guide and have Xming server running and Xbian data tunneled into my lapton by enabling X11 forwarding in Putty. And still... I cannot get into graphical mode or get XBMC displayed in my laptop screen...

Any piece of advice would be of great help. I'll report progress based on your advice, have no doubt.

Regards,